857
| Millennium: | 1st millennium |
|---|---|
| Centuries: | |
| Decades: | |
| Years: |
| Gregorian calendar | 857 DCCCLVII |
| Ab urbe condita | 1610 |
| Armenian calendar | 306 ԹՎ ՅԶ |
| Assyrian calendar | 5607 |
| Bengali calendar | 264 |
| Berber calendar | 1807 |
| Buddhist calendar | 1401 |
| Burmese calendar | 219 |
| Byzantine calendar | 6365–6366 |
| Chinese calendar |
丙子年 (Fire Rat) 3553 or 3493 — to — 丁丑年 (Fire Ox) 3554 or 3494 |
| Coptic calendar | 573–574 |
| Discordian calendar | 2023 |
| Ethiopian calendar | 849–850 |
| Hebrew calendar | 4617–4618 |
| Hindu calendars | |
| - Vikram Samvat | 913–914 |
| - Shaka Samvat | 778–779 |
| - Kali Yuga | 3957–3958 |
| Holocene calendar | 10857 |
| Iranian calendar | 235–236 |
| Islamic calendar | 242–243 |
| Japanese calendar |
Saikō 4 / Ten'an 1 (天安元年) |
| Javanese calendar | 754–755 |
| Julian calendar | 857 DCCCLVII |
| Korean calendar | 3190 |
| Minguo calendar | 1055 before ROC 民前1055年 |
| Nanakshahi calendar | −611 |
| Seleucid era | 1168/1169 AG |
| Thai solar calendar | 1399–1400 |
Year 857 (DCCCLVII) was a common year starting on Friday (link will display the full calendar) of the Julian calendar.
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